I’ve talked a lot in the past about making sure that groups of player characters in an RPG work well together as a part of character creation (here here here here), but what about working well together during play?
Hero teams—whether from comics, movies, TV, or wherever—constantly have their members working together in interesting and creative ways during fight scenes. Combatants switch opponents, or provide covering fire, or make a distraction so that an ally can get the drop on an enemy, or even (as in the Fastball Special, pictured above) hurl an ally at an enemy.
Most RPGs are pretty terrible at modelling team moves like these. (Which is not to say that other RPGs don’t do teamwork, as anyone who has played D&D without a healer knows.)
Fate Core, on the other hand, has teamwork moves written right into the rules of the game.